Dr. Zexin Feng Profile

Dr. Zexin Feng

Associate Professor (tenured)

SPIE Involvement:

Author

Area of Expertise:

Freeform Optics , Inverse Problems in Optics , Optical Design , Compuational Optics , Fundamental Optics , Light Propagation

Proceedings Article | 4 December 2024 Paper

Single-shot phase retrieval using automatic differentiation and bilateral total variation

Chunyuan Chen, Zexin Feng

Proceedings Volume 13283, 1328341 (2024) https://doi.org/10.1117/12.3037196

KEYWORDS: Phase retrieval, Diffraction, Image restoration, Reconstruction algorithms, Phase reconstruction, Windows, Signal to noise ratio, Sensors, Wave propagation, Mathematical optimization

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Proceedings Article | 27 November 2024 Paper

Differentiable freeform lens design for irradiance tailoring on tilted target plane

Haisong Tang, Zexin Feng, Yi Luo

Proceedings Volume 13237, 132370Q (2024) https://doi.org/10.1117/12.3033378

KEYWORDS: Freeform optics, Design, Light sources and illumination, Ray tracing, Monte Carlo methods, Light sources, Receivers, Evolutionary optimization, Computer simulations, Geometrical optics

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Proceedings Article | 17 June 2024 Paper

Freeform illumination lens design with a predefined exit surface

Zexin Feng, Haisong Tang, Haoran Li

Proceedings Volume 13022, 130220F (2024) https://doi.org/10.1117/12.3022815

KEYWORDS: Freeform optics, Design, Ray tracing, Wavefronts, Light sources and illumination, Lens design, Light sources, Optical surfaces, Monte Carlo methods, Computer simulations

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Proceedings Article | 18 December 2023 Paper

Experimental demonstration of Monge-Ampère equation for coherent beam field reconstruction

Xiao Ma, Haoran Li, Chunyuan Chen, Zexin Feng

Proceedings Volume 12968, 129681Z (2023) https://doi.org/10.1117/12.3008073

KEYWORDS: Phase distribution, Phase retrieval, Complex amplitude, Beam analyzers, Phase reconstruction, Laser beam propagation, Wave propagation, Fourier transforms, CCD cameras, Wavefront sensors

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Proceedings Article | 28 November 2023 Paper

Spherical-freeform lens design for uniform illumination based on differentiable ray tracing with uv polynomials

Haoran Li, Haisong Tang, Zexin Feng, Yi Luo, Yongtian Wang

Proceedings Volume 12765, 127650H (2023) https://doi.org/10.1117/12.2687294

KEYWORDS: Optical surfaces, Ray tracing, Light sources and illumination, Lens design, Light sources, 3D projection, Spherical lenses, Partial differential equations, Numerical analysis, Design and modelling

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Proceedings Article | 20 January 2023 Paper

Fast irradiance evaluation of freeform illumination lenses based on deep learning

Haisong Tang, Zexin Feng, Dewen Cheng, Yongtian Wang

Proceedings Volume 12559, 125590F (2023) https://doi.org/10.1117/12.2652055

KEYWORDS: Freeform optics, Neural networks, Lens design, Computer simulations

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Proceedings Article | 9 October 2021 Paper

Iterative freeform lens design for extended light source

Zexin Feng, Dewen Cheng, Yongtian Wang

Proceedings Volume 11895, 1189506 (2021) https://doi.org/10.1117/12.2601317

KEYWORDS: Freeform optics, Lens design, Ray tracing, Light emitting diodes, Computer simulations, Monte Carlo methods, Light sources, Wavefronts, Light sources and illumination

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Proceedings Article | 12 September 2021 Presentation + Paper

Optimizing freeform lenses for non-rectangular irradiance tailoring of extended LED sources

Zexin Feng, Yuyin Li, Dewen Cheng, Yongtian Wang

Proceedings Volume 11874, 118740O (2021) https://doi.org/10.1117/12.2597092

KEYWORDS: Ray tracing, Freeform optics, Light emitting diodes, Lens design, Computer simulations, 3D modeling, Optimization (mathematics), MATLAB, Monte Carlo methods, Data modeling

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Proceedings Article | 5 November 2018 Paper

Optimizing double freeform surfaces for reducing deviations in ray-mapping method

Haotian Xu, Zexin Feng, Dewen Cheng, Yongtian Wang

Proceedings Volume 10815, 108151B (2018) https://doi.org/10.1117/12.2501083

KEYWORDS: Ray tracing, Freeform optics, Light emitting diodes, Geometrical optics, Lens design, Optical design, Light sources and illumination

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Proceedings Article | 5 November 2018 Paper

Freeform lens design for laser diode beam shaping

Zexin Feng, Dewen Cheng, Yongtian Wang

Proceedings Volume 10815, 108150K (2018) https://doi.org/10.1117/12.2500048

KEYWORDS: Freeform optics, Ray tracing, Lens design, Beam shaping, Wavefronts, Semiconductor lasers, Monochromatic aberrations, Collimation, Laser development

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Proceedings Article | 28 May 2018 Paper

Freeform road lighting lens design

Zexin Feng, Dewen Cheng, Yongtian Wang

Proceedings Volume 10693, 106930E (2018) https://doi.org/10.1117/12.2312452

KEYWORDS: Light sources and illumination, Roads, Freeform optics, Light emitting diodes, Ray tracing, Lens design, Monte Carlo methods, Computer simulations, Energy efficiency, Lamps

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Proceedings Article | 8 September 2015 Paper

Hybrid freeform TIR optics construction in Cartesian coordinate system: a new composite ray mapping method

Donglin Ma, Zexin Feng, Chengliang Wang, Rongguang Liang

Proceedings Volume 9571, 95710H (2015) https://doi.org/10.1117/12.2190759

KEYWORDS: Ray tracing, Composites, Freeform optics, Geometrical optics, Light emitting diodes, Lens design, Spherical lenses, Hybrid optics, Light, LED lighting

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Proceedings Article | 28 August 2015 Paper

Non-uniformly sampled grids in double pole coordinate system for freeform reflector construction

Donglin Ma, Shaun Pacheco, Zexin Feng, Rongguang Liang

Proceedings Volume 9572, 95720N (2015) https://doi.org/10.1117/12.2190761

KEYWORDS: Reflectors, Ray tracing, Reflector design, Lens design, Computer aided design, Solids, Spherical lenses, Optical spheres, Freeform optics, Light

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SPIE Journal Paper | 1 February 2011

Reflector design for large-size spherical surface sources

Liangliang Cao, Yanjun Han, Zexin Feng, Yi Luo

OE, Vol. 50, Issue 02, 023001, (February 2011) https://doi.org/10.1117/12.10.1117/1.3541803

KEYWORDS: Reflectors, Reflector design, Spherical lenses, Absorption, Reflection, Light, Optical engineering, Optoelectronics, Monte Carlo methods, Electronics engineering

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